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74ABT244CMSA 데이터시트(PDF) 6 Page - Fairchild Semiconductor |
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74ABT244CMSA 데이터시트(HTML) 6 Page - Fairchild Semiconductor |
6 / 13 page ©1992 Fairchild Semiconductor Corporation www.fairchildsemi.com 74ABT244 Rev. 1.4 6 Extended AC Electrical Characteristics SOIC package. Notes: 8. This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.). 9. This specification is guaranteed but not tested. The limits represent propagation delay with 250pF load capacitors in place of the 50pF load capacitors in the standard AC load. This specification pertains to single output switching only. 10. This specification is guaranteed but not tested. The limits represent propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.) with 250pF load capacitors in place of the 50pF load capacitors in the standard AC load. 11. The 3-STATE delays are dominated by the RC network (500 Ω, 250pF) on the output and have been excluded from the datasheet. Symbol Parameter TA–40°C to +85°C, VCC = 4.5V–5.5V, CL = 50pF, 8 Outputs Switching(8) TA = –40°C to +85°C, VCC = 4.5V–5.5V, CL = 250pF, 1 Output Switching(9) TA = –40°C to +85°C, VCC = 4.5V–5.5V, CL = 250pF, 8 Outputs Switching(10) Units Min. Typ. Max. Min. Max. Min. Max. fTOGGLE Max Toggle Frequency 100 MHz tPLH Propagation Delay, Data to Outputs 1.5 5.0 1.5 6.0 2.5 8.5 ns tPHL 1.5 5.0 1.5 6.0 2.5 8.5 tPZH Output Enable Time 1.5 6.5 2.5 7.5 2.5 10.0 ns tPZL 1.5 6.5 2.5 7.5 2.5 12.0 tPHZ Output Disable Time 1.0 5.6 (11) (11) ns tPLZ 1.0 5.6 |
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